Hi there. I read the article from your link (kind of old but OK to understand the basics). Now there is something I can't understand: "800MHz FSB = DDR2 533MHz ( Ideal ) or DDR2 400MHz ( Matched but Slow. ) 1066MHz FSB = DDR2 667 ( Good ) or DDR2 533MHz ( Matched )".
If you have an Intel based platform with a FSB 800 CPU means that your basic FSB is 800 / 4 (Quad pumped) = 200. This means you should purchase the memory running at 200 * 2 = 400MHz. The article says to this combination "Matched but Slow". The 533MHz Ram has a basic freq. of 533 / 2 = 266MHz. How can this combination be IDEAL???.
I read in another article that running a FSB:RAM ratio of 1:1 is the best match but you will get better performance running the mem. 2 x FSB in an ratio of 1:2. In another words for an Intel based platform with a 800MHz FSB CPU the best combination would be buying 800MHz RAM (running the system in a 1:2 ratio).
I personally want to buy a 7xxx CPU with FSB 1066. To have a 1:1 ratio I would have to buy 1066 / 2 = 533MHz DDR2 modules (which run at a base freq. of 266MHz). But what if I buy DDR2@1066 MHz modules? According to the other articles I would run the system in a 1:2 ratio.